Sandwich type ceramic liner fracture rate with the Atlas III™ socket: A study of 144 primary total hip replacements at a mean 74 months' follow-up.

Introduction: Ceramic friction bearings have been proposed as a means of reducing wear in total hip replacement (THR). A "sandwich" composite concept including a ceramic bearing surface has been proposed as simplifying the modularity while matching metal-back cups with a polyethylene liner. It is not precisely known how frequently abnormal noise would occur during functioning of this type of implant, which moreover entails a risk of ceramic liner fracture.

[Duplication of the complete lumbosacral spine. Apropos of 1 case].

The rare case of a 6 year old child with spinal cord duplication and malformations is reported. The malformation was probably related more to a double monster context than to a notochordodysraphism.